Question

решите уравнения
17(5+х)-20х=8х-14.....
24х-12(7+х)=16-8х.....
29+14(9-у)=19-2у......
-15(4у-3)+37у=42у-111......
пожалуйста!!!!)∞

Answer 1

17(5+x)-20x=8x-14
85+17x-20x=8x-14
85-3x=8x-14
-3x-8x=-14-85
-11x=-99
x=99:11
x=9

24x-12(7+x)=16-8x
24x-84-12x=16-8x
12x-84=16-8x
12x+8x=16+84
20x=100
x=100:20
x=5

29+14(9-y)=19-2y
29+126-14y=19-2y
155y-14y=19-2y
-14y+2y=19-155
-12y=-136
y=136:12
y=34/3

-15(4y-3)+37y=42y-111
-60y+45+37y=42y-111
-23y+45=42y-111
-23y-42y=-111-45
-65y=-156
y=156:65
y=12/5